Oct 8, 2009 - Valve, creator of best-selling game
franchises (such as Half-Life and Counter-Strike) and leading technologies (such
as Steam and Source), today announced Scavenge, the fourth game mode to be
included in its upcoming zombie thriller, Left 4 Dead 2.

Scavenge mode challenges players to compete in round-based games of up to 8
players (Survivors vs. Infected). The Survivors must battle both the Infected
and the clock as they collect gas cans to refuel a generator located in each
map. Every can the Survivors pour into the generator scores their team a point
and adds time to the clock.

On defense, the Infected team plays as the boss Infected (including the new
Spitter, Jockey, and Charger). They must keep the Survivors from fueling the
generator by attacking them, destroying the gas cans, or running out the clock.
During a round, each team gets an opportunity to play both sides, with the round
going to whichever team successfully delivers the most cans.